I Zwicky 18
galaxy
The I Zwicky 18 is an irregular dwarf galaxy. It is 45 million years light from Earth in the constellation of the Ursa Major. It was identified by first time in the 1930s by the astronomer Fritz Zwicky.
| I Zwicky 18 | |
|---|---|
 I Zwicky 18 observed by the Hubble Telescope | |
| Observation data (J2000 [1] epoch) | |
| Right ascension | 09h 34m 02.0s[1] |
| Declination | 55° 14′ 28″[1] |
| Redshift | 751±2 km/s |
| Distance | 0.059 Gly |
| Characteristics | |
| Type | Irr [2] |
| Notable features | Very young galaxy [2][3] |
| Other designations | |
| UGCA 166, SBS 930+554, KUG 930+554, AGC 190351, HFE2003 PSX-01, CBB2012 79 | |
A young galaxy change
I Zwicky 18, only 500 million years of age, is a recently born galaxy compared with most.[3] It is still making population III stars, almost entirely made of hydrogen and helium. The Milky Way is about 12,000 million years old.
Related pages change
Other websites change
- NASA/IPAC Extraglactic Database
- I Zwicky 18 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
References change
- ↑ 1.0 1.1 1.2 "SIMBAD Astronomical Database".
- ↑ 2.0 2.1 "NASA - Hubble Finds 'Dorian Gray' galaxy". Archived from the original on 2016-04-25. Retrieved 2016-10-27.
- ↑ 3.0 3.1 HubbleSite. "HubbleSite:I Zwicky 18: possibily the youngest galaxy ever seen".